TC1223

Features:

• Extremely Low Ground Current for Longer Battery Life
• Very Low Dropout Voltage
• Choice of 50mA and 100mA Output (TC1223, TC1224, Respectively)
• High Output Voltage Accuracy
• Standard or Custom Output Voltages
• Power Saving Shutdown Mode
• Over Current and Over Temperature Protection
• Space-Saving 5-Pin SOT-23A Package
• Pin Compatible Upgrades for Bipolar Regulators




Application

• Battery Operated Systems
• Portable Computers
• Medical Instruments
• Instrumentation
• Cellular/GSM/PHS Phones
• Linear Post-Regulators for SMPS
• Pagers




Pinout






Specifications

Parameter NameValueMax Input Voltage6Output Voltage (v)2.5, 2.7, 2.8, 3.0, 3.3, 3.6, 4.0, 5.0Typical Active Current (A)50Typical Dropout Voltage @ Max. lout (mV)85Typical Output Voltage Accuracy (%)0.5Output Capacitor TypeAluminum/Tantalum

Parameter Name	Value
Max Input Voltage	6
Output Voltage (v)	2.5, 2.7, 2.8, 3.0, 3.3, 3.6, 4.0, 5.0
Typical Active Current (A)	50
Typical Dropout Voltage @ Max. lout (mV)	85
Typical Output Voltage Accuracy (%)	0.5
Output Capacitor Type	Aluminum/Tantalum

Absolute Maximum Ratings*

Input Voltage ........................................................6.5V
Output Voltage.......................... (-0.3V) to (V_IN + 0.3V)
Power Dissipation............................. Internally Limited
Maximum Voltage on Any Pin ...........V_IN +0.3V to -0.3V
Operating Temperature Range....-40°C < T_J < 125°C
Storage Temperature......................-65°C to +150°C

Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operation sections of the specifications is not implied. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability.

Description

The TC1223 and TC1224 are high accuracy (typically ±0.5%) CMOS upgrade for older (bipolar) low dropout regulators such as the LP2980. Designed specifically for battery-operated systems, the devices CMOS constructio neliminates wasted ground current, significantly extending battery life. Total supply current is typically 50 A at full load ( 20 to 60 times lower than in bipolar regulators!). Key features for the TC1223 and TC1224 include ultra low-noise operation; very low dropout voltage (typically 85 mV and 180 mV,respectively, at full load) and fast response to step changes in load. Supply current is reduced to 0.5 A (max) and VOUT falls to zero when the shutdown input is low. The devices also incorporate both over-temperature and over-current protection. The TC1223 and TC1224 are stable with an output capacitor of only 1 F and have a maximum output current of 50 mA and 100 mA, respectively. For higher output versions, please see the TC1107, TC1108, and TC1173 (IOUT = 300 mA) data sheets.